ColeKimball (shoulder) has joined Washington's GCL club to begin a rehab assignment.

Kimball underwent major shoulder surgery last July and appears to be slightly ahead of schedule in his recovery. He posted an 1.93 ERA and 11/11 K/BB ratio over 14 innings with the Nationals last season. The 26-year-old right-hander will likely be stationed at Triple-A Syracuse once he returns to full health, though he could potentially reach Washington when rosters expand in September if everything breaks right.